Dumping mechanism for vehicles



1,640,358 Aug. 30, 1927. J M. HOWE DUMPING MECHANISM FOR VEHICLES File'dApril 1925 3 Sheets-Sheet 1 wbmwmm Aug. 30 1927.

1,640,358 J, M. HOWE I sum-me MECHANISM FOR vmm'cms Filed Abrn 2, 1925 3Sheets-Sheet 2 Aug. 30,1927. 1,640,358

, J. M. HOWE DUMPING MECHANISM FOR vnnxcws v Filed April 2, 1925 3Sheets-Sheet 3 Patented Aug. 30, 1927.

UNITED STATES] PaTie-NT omen JAMES HOWE, 0F CLEVELAND HEIGHTS, or'z'io,ASSIGNQR To THE- MURRAY PROD- UCTS COMPANY, on CLEVELAND; OHIO, ACORPORATION OF MICHIGAN.

DUMYING MECHANISM FOR VEHICLES.

Applicationfiled April 2, 1525. serial in. 20,093.

This invention is directed to improvements in dumping mechanisms for thebodies of vehicles and has for its general object a simple mechanismwhich may be operated to tilt a pivotally mo'u 'ited body on the rear ofa truck and which, when in a normal non-dumping position, may serve tolock the body in a load carrying position;

More specifically my invention is eta: ceine'd with a dumping mechanismof the m nuall operated link motion type which may be serviceable totilt load carrying.

bodies of light capacity and which includes a pivotal connection for thelinks of th'e' mechanism which may be swung over a dead centerpositionand thereby lock the body in a normally horizontal position. v

Other objects of my invention will here'- inat'ter become apparent inthe following description referring to the accompaning drawings whichillu'stratea preferred v orm thereof. The essential characteristics aresummarized in the claims. V i I I I In the drawings Fig. 1 is a sideelei'rati'on of a truck equipped with a dumping mechanism embodying myinvention; Fig. 2 is an enlarged cross-sectional view 's'ubst'antiaL lyalong the plane 2-2 of Fig. 1 showing the dumping mechanism in aretracted or normal position; Fig. 3 is fragmentary enlarged view of thelink mechanism, show ing, in full lines the mechanism extended todumping position and in dotand dash lines to a normal position Fig. 4 isa modi- 'fied form of my invention with the mechelusive show modifiedforms bf dumpingmechanisms embodying my invention.

In the drawings Figs. 1 nine, show a truck having the chassis side bars10 thereof surmounted by a body 11 piyotally connected to the chassisside bars adjacent the rear thereof as shown at 12, A pair of members 13in the form of a body rest are mounted upon the chassis sidebarsintermediate the seat 1 1 of the truck and the rear end of the 'dumpbody. The dunip 0 mechanism is such that when the body 11 is lowered toa horizontal load carrying position the body will be resiliently urgedto remain in contact with the members 13 thus preventing rattling ofthe'body while the" vehicle is moving.

As ho n in 1 and 2, the dump niechanism ma-y comprise a crank shaft 15suitably mounted on bearing plates 16 and 17 which are preferablysecured to the hori zontal faces of the chassis members 10; a linkagearrangement comprising link arms 20 rigidly secured to the shaft.adjacent-ithe brackets It and 17 and offset swinging links 21,resiliently connected to the body. A crank arm 15 is, shown ascomprising an integral part of the but this aim may comprise a leverextendin upwardly to a position adjacent th'e seat if desired.

The lower ends of the links 21 are pivotally connected to the link arms20 by pins 22 and the upper ends of the links are p1votally connected,to Lshape d members 24 by" pins 25. 'lh e Li-shaped members 24 areresiliently connected to thebody by plunger pins 2 8 which b'ea1-. inL-sha ed bracket l'riembers 29 secured to the side walls of the bodyadjacent the frontend thereof at a position which aligns Vertically withthe axis of the startle when the truck body is a no mal load carryingposition. Resili'entmeanspreferablyin the form of rubbe'rplugs' 30 aredisposed between the upper ends 28 of the plungers 28 and the horizontalextensions ofthe brackets 29, whereby when the diimpih mechanism is in alewered position, the flag 30 may be compresse'd and t-hi scompressingaction of the plugs 30 serves to maintain the body in a forced restingposition on the members 13.

To maintain the plug in the compressed ce'ndition shown in Fig. 2, whenthe crank arm 15 is released by the operator. the links 21 are of suchform as to be olfset topermit the swinging'p'f the arms 20 .to bring theconnecting pins 22' beyond a vertical plane extending throughthefaxisofthe shaft 15 and the "ins 25, and'this ofis'et may be such that theinks 21 will contact with the shaft Hit) - spring steel.

.8, into the vertical plane referred to and ai upset portions in theform of stop lugs 31 which contact with the edges of the link arms 20 tolimit the upward swinging move ment of the links in a well known manner.

In Figs. to 8, I show Various ways of incorporating a resilient means inthe dumpingwmechanism which may be utilized as a substitute for therubber plugs 30. In Fig. 5, I provide brackets 29 which may be formed ofresilient material such as flat These brackets may be provided with aspring loop 40, having a horizontally extending portion 41 to which thelink pivot members 24 may be secured by any suitable means such as bolts42. The other elements embodied in this form of dumping mechanism areidentical with the elements hereinbefore described and, arecorrespondingly numbered.

In Fig. 6, the resiliency is provided in the mechanism by forming thelinks which connect the body to the, shaft or link arms 20, of springmetal. Thus link members 21 may be formed of spring steel having loopportions 16, which will permit relative displacement of the link endsand allow the overswinging of the shaft as hereinbefore described.

In Fig. 7 I show still another manner of providing resiliency in themechanism which may comprise flat spring members secured to the sidewalls, but adjacent the bottom of the dump body with the upper endsfree. Suitable means, such as members 51 secure the lower ends of thespring mem-- bers to the dump body. To these spring members, I maysecure the bracket members 29, instead of securing the bracket membersdirect to the body as hereinbefore described. The upper ends of thespring members 50 are free to move and slide on the side walls of thedump body and pass through brackets or retaining clips 52 as shown inFig. 8. It will be apparent that part of the dump body side walls couldbe formed of thin metal whereby the brackets 29 could be slightlydisplaced relative to their normal positions.

From the foregoing description of my invention, it will be seen that adump mechanism is provided of a very simple and economical form which isefficient for tilting bodies of light load capacity and will also serveto lock the body in a normal load carrying position, when the dumpmechanism is retracted. The mechanism is such that all membersthereofare placed under tension and are thus prevented from rattling andconsequently the factor of silent operation is assured.

I claim p 1. In a dumping mechanism of the character described, a shaftmounted on the chassis of a vehicle, a linkage mechanism mounted on'theshaft and connected to the dump body of the vehicle and resilientconnecting mechanism permanently connecting the body of the vehicle tothe link mechanism arranged to restrain the body against movement whensuch body is in normal position.

In a vehicle of the character described, the combination with a dumpbody pivotally mounted at one end on the chassis of the vehicle of atransverse shaft mounted on the chassis adjacent the other end of thedump body, a pair of arms rigidly mounted on the shaft, a pair of linkmembers pivotally connected to the arms and pivotal connections betweentheother ends of the link members and walls of the dump body includingresilient means permitting an overtravel of the link arms to a definitelocking position by a swinging movement of the shaft.

3. In a vehicle of the character described, the combination with a dumpbody pivotally mounted at one end to the chassis of the vehicle, atransverse shaft mounted on the chassis adjacent the other end of thedump body, a pair of arms rigidly mounted on the shaft, a pair of linkmembers pivotally connected to the free ends of the arms and pivotalconnecting meansfor the other ends of the link members, brackets mountedon the walls of the dump} body and resilient means permanently connectedto the links to permit an overtravel of the link arms past a dead centerposition by a swinging moveinent of the shaft.

body, a crank arm rigidly mounted on the shaft at each side of the body,link members pivotally connected to the arms, said links having offsetportions adapted to span the shaft, and a resilient connection betweenthe other ends of the arms and the wallsof the dump body includingresilient means acting on plungers and means mounted on the bodysupporting said plungers.

5. In a vehicle of the character described, the combination of a dumpbody pivotally mounted on the chassis of the vehicle, a

transverse shaft mounted on the chassis, a pair of link arms rigidlyattached to the shaft adjacent the sides of the body, a pair of linkspivotally connected to said arms and to the body, the pivotal centers ofsaid connections for said links being adapted to be brought intovertical alignment With the axis of the shaft and a resilient connectionpermanently disposed between the upper ends of the links and the linkpivots adja cent the body for permitting an overswinging movement pastthe dead center of the pivotal connections between the links and thelink arms.

6. In a vehicle of the character described, the combination of a dumpbody pivotally mounted on the chassis of the vehicle, a

body, the pivotal centers of said connections for said links beingadapted to be brought into vertical alignment with the axis of the shaftand by reason of said resilient connections the shaft is adapted to overtravel and bring the offset portions of said links into contacttherewith.

In testimony whereof, I hereunto afiix my signature.

JAMES M. HOWE.

